Microwave Communication The antenna separations (in meters) required for optimum operation of a space diversity system can be calculated from:where R = effective earth radius (m) and L = path length (m) S = 3λR/L S = λR/L S = λR/RL S = 2λR/L S = 3λR/L S = λR/L S = λR/RL S = 2λR/L ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication What is the purpose of the electromagnetic field which surrounds a traveling-wave tube? To keep the electrons from spreading out To accelerate the electron To velocity modulate the electron beam To slow down the signal on the helix To keep the electrons from spreading out To accelerate the electron To velocity modulate the electron beam To slow down the signal on the helix ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication Rainfall is an important factor for fading of radio waves at frequencies above 100 GHz 10 GHz 1 GHz 100 MHz 100 GHz 10 GHz 1 GHz 100 MHz ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication Which of the reception problems below that is not due to multipath? Rayleigh fading Random Doppler shift Delayed spreading Slow fading Rayleigh fading Random Doppler shift Delayed spreading Slow fading ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication If k-factor is greater than 1, the array beam is bent Towards the outer space Towards the earth Away from the earth Towards the ionosphere, Towards the outer space Towards the earth Away from the earth Towards the ionosphere, ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the Distributed lead inductance Electron transit time Inter-electrode capacitance Degree of emission from the cathode Distributed lead inductance Electron transit time Inter-electrode capacitance Degree of emission from the cathode ANSWER DOWNLOAD EXAMIANS APP
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